percieving color

Question 1

basic colors

Answer 1

red green yellow blue

Question 2

intensity

Answer 2

changes percieved brightness

Question 3

saturation

Answer 3

add white to a color to make it less saturated

Question 4

wavelengths for colors

Answer 4

violet- 400-450 nm
450-490 nm blue
500-575 green
575-590 yellow
590-620 orange
620-700 red

Question 5

chromatic colors

Answer 5

a color that has a hue to it

Question 6

achromatic color

Answer 6

contains no hues - white and black

Question 7

trichromatic theory of vision

Answer 7

3 different receptors - short, medium, long wavelengths
people can only match colors if it has 3 wavelengths
3 cones

Question 8

additive color mixture

Answer 8

mixing 3 colors (RGB) together in a pie chart

Question 9

subtractive color

Answer 9

start with light and mix color till its dark

Question 10

dichromatism

Answer 10

people who only need two wavelengths to match a color

Question 11

opponent processing theory of color vision

Answer 11

red/green
blue/yellow
white/black
colors trigger opponent neurons to fire as well

Question 12

opponent neurons

Answer 12

located in the LGN and retina

Question 13

afterimages

Answer 13

neurons that see certain colors flip to opposing neuron when the color dissapears

Question 14

color constancy

Answer 14

perception or colors is relatively constant even in changing light sources
works best when object is surrounded by many colors

Question 15

chromatic adaption

Answer 15

prolonged exposure to chromatic color leads to

• receptors adapting when a stimulus selectively bleaches a certain pigment
• sensitivity to a certain color decreases

Question 16

ratio principle

Answer 16

2 areas that reflect different amounts of look the same if the ratios of their intensities are the same

Question 17

reflectance edge

Answer 17

edge where reflectance of 2 surfaces changes border between A&B

Question 18

illumination edge

Answer 18

edge where lighting changes. difference between b & c

Question 19

pnumbra

Answer 19

fuzzy border at the end of a shadow

Question 20

shadow

Answer 20

when light is blocked by an object